moto g cant bootup

recently i downgraded from 5.0.2 to 4.4.4 and then tried to 5.0.1 .. install from sd card is completed and prompted for restart.. when i hit the restart.. screen goes black and nothing goes.. power button not respond to anything. no boot loader no recovery... tried the motorola qboot utility v2.4 (blankflash) but failed.. invalid .

is there any version for lollipop bootloader version?. provide the link